| 摘要 |
PURPOSE:To guarantee correct operation, by connecting a plurality of T-FFs with a reset terminal in cascade, applying an output of the T-FFs to a D-FF to which clocks of opposite polarity are applied, and resetting the T-FFs with the output of the D-FF. CONSTITUTION:When an output of a T-FF9 is at H, if the ouput of a T-FF7 is at H, a D-FF11 is set with a fall of the clock at a terminal (b), the potential of a terminal Q' is at L, and the T-FFs 7-9 are reset. As a result, the output of a gate 10 is at L and the D-FF is reset. That is, since the reset signal for the T-FF has sufficient length, the malfunction due to the fluctuation of FFs in manufacture can be prevented and accurate 1/6 frequency division can be assured. |
